The Deionization & Demineralization Water Experts!

Deionization (DI) is a form of water filtration that ensures total dissolved solids (TDS) are removed from water through an ion exchange process. By controlling the electric charge of ions in water, it makes it possible to remove the TDS. Essentially, DI resins used within the filtration process attract non-water ions and replace them with water ions, leaving a more pure form of water compared to tap water. While many companies and corporations rely on deionized water for any number of applications, your Culligan water expert can help recommend the best process for your needs.

Culligan Give You the Choice!

DO I NEED MY OWN SYSTEM? Maybe!

DOES CULLIGAN HAVE A DEIONIZATION EXCHANGE PROGRAM? Absolutely!

Deionization systems can be expensive to buy, install, and most importantly maintain but Culligan delivers the expertise and integration you need.

  • Culligan also provides Deionization Exchange Service that eliminates capital investment while providing all the benefits of your own DI process without regulatory training and constraints.
  • DI Exchange tanks will be plumbed directly into your water supply and can be exchanged as needed.
  • Regardless of the flow needed, once the resin tanks are exhausted, they’re simply exchanged on a regular schedule and regenerated off-site.

No matter which option is right for you and your business, Culligan will help you determine your requirements and provide an affordable solution.

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Tap Water vs. Deionized Water

Tap water may contain:

  • Unfiltered ground water
  • Unwanted ions
  • Minerals or other solids
  • Chlorine
  • TDS of 100-600 or more
  • A combination of H20 & charged ions
  • Potential bacteria and other impurities
Ideal for drinking, bathing, cooking, cleaning and overall home use

Deionized water:

  • Comes from ion exchanged demineralization
  • Eliminates unwanted ions
  • Eliminates unwanted minerals
  • Eliminates unwanted chlorine
  • Eliminates unwanted minerals or solids (TDS)
  • Pure h2o
  • May still contain bacteria and other impurities
Ideal for lab chemicals, production, manufacturing and general industry

Did You Know?

Deionization Chart

The process of deionization uses two resins that are opposite in charges – the cationic (negative) and the anionic (positive). The cationic resin is typically made from styrene containing negatively charged sulfonic acid groups, and will be pre-charged with hydrogen ions. This resin will attract the positively charged ions in the water (Ca++, Mg++, Na+, etc.) and releases an equivalent amount of hydrogen (H+) ions.

Like the cationic, the anionic resin is also made from styrene, but contains positively charged quaternary ammonium groups, and will be pre-charged with hydroxide ions. This resin will attract the negatively charged ions (HCO3-, Cl-, SO4--, etc.) and releases an equivalent amount of hydroxide (OH-). The hydrogen and hydroxide ions then combine to form water. (H+ + OH- = HOH or H2O.)

The two resins can be ionized at different levels, usually weak or strong. The cationic can be either a strong or weak acid. The anionic resin can be either a strong or weak base. A weaker ionization process will exchange only the weaker ions, providing for a greater capacity (longer filter cartridge life), while a stronger ionization will provide a higher degree of ion exchange, but at the cost of reduced capacity (shorter filter cartridge life).